ah, yes my OSH boost controller, cost me a whoppin 2 bucks...
but time after time i get "you should get a real one" blablabla... aside from the laziness factor, why won't this work that great?
i hear it's prone to boost spikes, but why? and why would it be more prone than a normal boost controller?

-erik

 

well.. there are different ways of makin a manual boost controller. some designs are actually better than others. puttin it together and usin the right pieces make a better mbc.

 

a friend of mine had some problems with it spiking a couple psi over his target boost, but then just moved it to right up against the wastegate and it works like a charm, no spike and it spools fast as hell. I thinkthe lag in the wastegate opening caused by the long route the boost had to take from the MBC to the actuator in order to open the wastegate. by shortening the route, there is no spike. kinda cool. his valve also has a little vent hole on it (the drill bit used looks like two or three hairs!)

 

i used a home made boost controller for years before i got my evc. it consisted of a vacuum tee and a vacuum cap with a small hole in it. i could actually control the boost with the size of the holes in the vacuum caps. i never had problems with the boost spiking. it worked pretty damn good if you ask me.

 

I used one for a while. Cost me about $5 from directions from C-speed Racing. The problem was, that once the thing heated up, it wouldn't bleed boost off until much higher psi levels.

It was very hard to adjust the spring. 1/8 of a turn would make it go from 4psi to about 25psi.

I guess it's all about how you make it.